The Highlands at Canyon Ridge streets are named after three Arizona mines. Mamie Maud was one of a group of mines on the south side of Black Mountain that yielded silver, gold, copper, lead, manganese and zinc. The Silver Star mine yielded native silver, cerussite, argentile, crocoite and vanadinite. The Rackensack Mine, northeast of Cave Creek, yielded silver, gold, copper, beryllium, molybdenum and lead.